swiftlang/swift-package-manager

[SR-7982] Swift build forces recompilation with Makefile

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#5,353 创建于 2018年6月12日

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 (19 评论) (0 反应) (1 负责人)Swift (10,145 star) (1,462 fork)batch import
buggood first issue

描述
Previous ID SR-7982
Radar rdar://problem/37440217
Original Reporter andreasw (JIRA User)
Type Bug

Ubuntu 18.04, Swift 4.2 dev.
Votes 0
Component/s Compiler, Package Manager
Labels Bug, Driver, StarterBug
Assignee None
Priority Medium

md5: b246f9ef9446cfcc35be81e5733a0227

Issue Description:

I have a simple Makefile for building:

build:

    swift build

After typing "make" the expected happens, the swift file is compiled.

After a second "make" the expected happens again, nothing is compiled.

Opening vim and typing ":make" I expected that nothing happens but the file is recompiled.

After a second ":make" in vim this time the expected happens again and nothing is compiled.

But if you close vim and type "make" again, the file has to be compiled again.

贡献者指南

技术栈
swift
领域
build systemdeveloper experience
议题类型
bug
难度面向新贡献者的预计实现难度，1 表示很小改动，5 表示专家级工作。
3
预计时间有经验贡献者完成调查、实现、测试并准备 pull request 的粗略时间范围。
1-2 days
活动状态议题当前的可参与程度：新鲜、活跃、陈旧、阻塞或等待维护者输入。
stale
清晰度议题是否清楚说明期望改动、验收标准和下一步。
clear
前置要求
Basic Swift knowledgeFamiliarity with MakefileUnderstanding of build systems
新手友好度1-100 的估计分数，表示该议题对首次贡献者的友好程度。
60
研究方向
Investigate the difference in behavior when running `swift build` directly vs. via vim's `:make`. The issue suggests that the build system's incremental compilation detection fails when the command is executed through vim. Check if environment variables (e.g., `TERM`, `VIM`) or file system events differ. Look into the Swift Package Manager's build logic in the `lib/Build` directory and the driver's file change detection. Review the 19 comments for any additional clues or partial solutions. Ensure the fix works consistently across different shell environments.